<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>元気いっぱいの猫的OJ平台</title>
    <meta name="description" content="Charcoal is a free Bootstrap 4 UI kit build by @attacomsian at Wired Dots." />
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!--Bootstrap 4-->
    <link rel="stylesheet" href="css/bootstrap.min.css">
</head>
<body>

<nav class="navbar navbar-expand-md navbar-dark fixed-top sticky-navigation">
    <a class="navbar-brand font-weight-bold" href="#">张某的OJ系统</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#topMenu" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="topMenu">
        <ul class="navbar-nav ml-auto">
        </ul>
    </div>
</nav>

<!--hero section-->
<section class="bg-hero">
    <div class="container">
        <div class="row vh-100">
            <div class="col-sm-12 my-auto text-center">
                <h1>我的OJ平台</h1>
                <p class="lead text-capitalize my-4">
                    基于 Java Servlet 实现的OJ系统
                </p>
                <a href="https://gitee.com/vigorous-fruit/java_oj" class="btn btn-outline-light btn-radius btn-lg">项目连接</a>
            </div>
        </div>
    </div>
</section>

<!--components-->
<section class="my-5 pt-5">
    <div class="container">


        <!-- Tables  -->
        <div class="row mb-5" id="tables">
            <div class="col-sm-12">
                <div class="mt-3 mb-5">
                    <h3>题目列表</h3>
                    <table class="table table-striped">
                        <thead>
                        <tr>
                            <th>编号</th>
                            <th>题目</th>
                            <th>难度</th>
                        </tr>
                        </thead>
                        <tbody id="problemTable">

                        </tbody>
                    </table>

                </div>
            </div>
        </div>


    </div>
</section>

<!--footer-->
<section class="py-5 bg-dark">
    <div class="container">
        <div class="row">
            <div class="col-md-6 offset-md-3 col-sm-8 offset-sm-2 col-xs-12 text-center">
                <!-- <h3>Upgrade to Pro Version</h3>
                <p class="pt-2">
                    We are working on <b>Charcoal Pro</b> which will be released soon. The pro version
                    will have a lot more components, sections, icons, plugins and example pages.
                    Join the waiting list to get notified when we release it (plus discount code).
                </p>
                <a class="btn btn-warning" href="https://wireddots.com/newsletter">Join Waiting List</a>
                <hr class="my-5"/> -->
                <p class="pt-2 text-muted">
                    &copy; by 元气果实能力者
                </p>

            </div>
        </div>
    </div>
</section>

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js"></script>
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>
        <!-- <script src="js/app.js"></script> -->
<script>
            //在页面加载的时候,尝试从服务器获取题目列表,通过ajax的方式来进行获取
            function getProblems() {
                // 1.先通过ajax从服务器获取到题目列表
                $.ajax({
                    url:"problem",
                    type:"GET",
                    //回调函数
                    success: function(data,status) {
                        //data是响应的body , status是响应的状态码
                        //2.把得到的响应数据给构造成一个HTML片段
                        makeProblemTable(data);
                    }
                })
            }

            //通过这个函数把data里面的数据给转换成HTML里面的片段
            function makeProblemTable(data) {
                let problemTable = document.querySelector("#problemTable");
                for(let problem of data) {
                    let tr = document.createElement("tr");

                    let tdID = document.createElement("td");
                    tdID.innerHTML = problem.id;
                    tr.appendChild(tdID);

                    let tdTitle = document.createElement("td");
                    let a = document.createElement("a");
                    a.innerHTML = problem.title;
                    
                    a.href = 'problemDetail.html?id=' + problem.id;
                    a.target="_blank";//页面跳转时是打开一个新的页面,而不是覆盖原有的页面
                    tdTitle.appendChild(a);
                    tr.appendChild(tdTitle);

                    let tdLevel = document.createElement("td");
                    tdLevel.innerHTML = problem.level;
                    tr.appendChild(tdLevel);


                    problemTable.appendChild(tr);
                }
            }

            getProblems();
        </script>
</body>
</html>
